JPH03238179A - Method for cooling top roll for producing electric resistance welded tube - Google Patents
Method for cooling top roll for producing electric resistance welded tubeInfo
- Publication number
- JPH03238179A JPH03238179A JP3570890A JP3570890A JPH03238179A JP H03238179 A JPH03238179 A JP H03238179A JP 3570890 A JP3570890 A JP 3570890A JP 3570890 A JP3570890 A JP 3570890A JP H03238179 A JPH03238179 A JP H03238179A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- top roll
- cooling water
- electric resistance
- resistance welded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 9
- 239000000498 cooling water Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は電縫管製造用トップロールの冷却方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for cooling a top roll for manufacturing electric resistance welded pipes.
「従来の技術」
電縫管は、第２図のように、底形ロール２１で底形した
素管２２の突き合わせ部２３を高周波溶接装置（周波数
２５０ＫＨｚ程度〉２４で加熱し、素管２２を溶接機ロ
ール２５で外側から抱え込み、溶接部２６が圧着される
ようにして製造している。"Prior Art" As shown in Fig. 2, the electric resistance welded pipe is produced by heating the butt part 23 of the base pipe 22 whose bottom has been shaped with a bottom roll 21 with a high frequency welding device (frequency of about 250 KHz) 24, and then welding the base pipe 22. It is manufactured by holding it in from the outside with a welding machine roll 25 and press-bonding the welded part 26.
上述した溶接機ロール２５の部分を詳述すると、第３図
に示すように、素管２２を両側から抱え込む１対のサイ
ドロール２７と、素管２２の上部にあって溶接部の両側
を上から押さえ付けている１対のトップロール２８とか
ら構成されている。このトップロール２８は、電縫管の
断面が楕円形になるのを防止するためにあるもので、電
縫管の形状を向上させる上で重要な役割を果たしている
。To explain in detail the parts of the welding machine roll 25 mentioned above, as shown in FIG. It is composed of a pair of top rolls 28 that are pressed down from the top. This top roll 28 is provided to prevent the cross section of the electric resistance welded tube from becoming oval, and plays an important role in improving the shape of the electric resistance welded tube.
そして、１−ツブロール２８は、溶接部からの熱影響の
ため、高温になるので冷却水をロール表面にかけて冷却
するようにしている。Since the 1-tube roll 28 reaches a high temperature due to the influence of heat from the welded portion, cooling water is poured onto the roll surface to cool it down.
［発明が解決しようとする課題］
最近、電縫管においては、品質要求水準の高い高靭性材
の需要が高まっているが、このような高靭性材の場合に
は、溶接部が酸化されるのを防止するために、溶接部近
傍を不活性ガスでガスシールして酸素濃度を低下させた
り、還元ガス等により溶接部を還元したりしながら溶接
するようにしている。また、溶接部に冷却水がかかるの
を防止するために、トップロールの冷却水を停止したり
絞ったりして圧延を行なっている。[Problem to be solved by the invention] Recently, there has been an increasing demand for high-toughness materials with high quality requirements for electric resistance welded pipes, but in the case of such high-toughness materials, welded parts are oxidized In order to prevent this, welding is performed by sealing the vicinity of the welding area with an inert gas to lower the oxygen concentration, or by reducing the welding area with reducing gas or the like. Further, in order to prevent cooling water from splashing onto the welded part, rolling is performed with the cooling water supplied to the top roll stopped or throttled.
そのため、トップロールは溶接部の熱影響のために、数
時間で亀裂が入り使用できなくなるので、ラインを停止
してロール交換を行なう必要があり、操業率の低下やロ
ール費の増大という問題点があった。As a result, the top roll cracks and becomes unusable within a few hours due to the effects of heat in the welding area, so it is necessary to stop the line and replace the roll, resulting in problems such as reduced operating efficiency and increased roll costs. was there.
この発明は、従来技術の上記のような問題点を解消し、
電縫管の溶接部に冷却水のかからない電縫管製造用トッ
プロールの冷却方法を提供することを目的としている。This invention solves the above-mentioned problems of the prior art,
An object of the present invention is to provide a method for cooling a top roll for manufacturing an electric resistance welded pipe in which cooling water is not applied to the welded portion of the electric resistance welded pipe.
［課題を解決するための手段］
この発明に係る電縫管製造用トップロールの冷却方法は
、冷却水ノズルにより冷却水をトップロールに噴射する
とともに、冷却水がトップロールから流れ落ちる前に、
冷却水をトップロールに接触しトップロールと逆方向に
回転する吸水ロールにより吸水するようにしたものであ
る。[Means for Solving the Problems] A method for cooling a top roll for manufacturing electric resistance welded pipes according to the present invention includes jetting cooling water onto the top roll using a cooling water nozzle, and, before the cooling water flows down from the top roll,
Cooling water is absorbed by a water absorption roll that contacts the top roll and rotates in the opposite direction to the top roll.
［作用］
この発明に係る電縫管製造用トップロールの冷却方法は
、冷却水ノズルにより冷却水をト・ツブロールに噴射す
るとともに、冷却水がトップロールから流れ落ちる前に
、冷却水を１−ツブロールに接触しトップロールと逆方
向に回転する吸水ロールにより吸水するようにしている
。このようにしているので、トップロールの冷却水が電
縫管の溶接部にかかることはなく、高靭性材等の高級品
質の電縫管を、トップロールの冷却水を停止したり絞っ
たりすることなしに製造できる。したがって、操業率が
向上するとともに、ロール費も低減できる。[Function] The method for cooling a top roll for manufacturing ERW pipes according to the present invention includes injecting cooling water onto the top roll using a cooling water nozzle, and spraying the cooling water onto the top roll before the cooling water flows down from the top roll. Water is absorbed by a water absorbing roll that contacts the top roll and rotates in the opposite direction to the top roll. In this way, the cooling water from the top roll will not come into contact with the welded parts of the ERW pipe, and the cooling water from the top roll will not be stopped or throttled when using high-quality ERW pipes made of high-toughness materials. It can be manufactured without any problems. Therefore, the operating rate can be improved and roll costs can also be reduced.
［実施例］
本発明の１実施例の電縫管製造用トップロールの冷却方
法を第１図により説明する。[Example] A method for cooling a top roll for manufacturing an electric resistance welded tube according to an example of the present invention will be explained with reference to FIG. 1.
第１図は、本発明の１実施例の電縫管製造用トップロー
ルの冷却方法を示す説明図である。電縫管１の溶接部２
を上部から押さえつけているトップロール３は、該トッ
プロール３の上方に配設したノズル６から冷却水を掛け
て冷却する。そして、トップロール３の前面側に、スポ
ンジ等吸水を有する材質からなる吸水ロール４を、その
回転軸５がトップロールの軸芯と平行でかつ同一平面上
にある状態でトップロールに接触して配備し、回転軸５
を回転自在に軸受（図示せず）で軸支する。回転軸５は
、中空でかつ表面には無数の小孔がもうけられており、
吸水ロール４で吸水した冷却水がこの小孔を通って回転
軸５の中空部分に集められるようになっている。回転軸
５の一端は閉鎖状態になっているが、他端にはスイベル
ジヨイントがもうけられており、このスイベルジヨイン
トを介してバキュームポンプ等により、回転軸５の中空
部分に集められた冷却水が回収される。FIG. 1 is an explanatory diagram showing a method of cooling a top roll for manufacturing an electric resistance welded tube according to an embodiment of the present invention. Welded part 2 of ERW pipe 1
The top roll 3 pressing down from above is cooled by spraying cooling water from a nozzle 6 disposed above the top roll 3. Then, a water-absorbing roll 4 made of a water-absorbing material such as a sponge is placed on the front side of the top roll 3 in contact with the top roll with its rotating shaft 5 being parallel to and on the same plane as the axis of the top roll. Deploy and rotate axis 5
is rotatably supported by a bearing (not shown). The rotating shaft 5 is hollow and has countless small holes on its surface.
Cooling water absorbed by the water absorbing roll 4 passes through this small hole and is collected in the hollow part of the rotating shaft 5. One end of the rotating shaft 5 is in a closed state, but a swivel joint is provided at the other end, and cooling is collected in the hollow part of the rotating shaft 5 by a vacuum pump or the like through this swivel joint. Water is recovered.
上述のように構成することにより、トップロールの冷却
水の８０％が回収され、残りの２０％の冷却水はロール
表面で蒸発するので、溶接部に冷却水がかかることはな
い。By configuring as described above, 80% of the cooling water on the top roll is recovered and the remaining 20% of the cooling water evaporates on the roll surface, so that the welding part is not sprayed with cooling water.
なお、トップロールの表面温度は、従来の冷却方法の場
合の５０〜６０℃に比較して１５０℃と高くはなるが、
ロールの耐久性を損なうことはない。Although the surface temperature of the top roll is higher at 150°C compared to 50 to 60°C in the case of conventional cooling methods,
It does not impair the durability of the roll.
［発明の効果］
本発明により、電縫管の溶接部に冷却水がかからないよ
うにして、トップロールの冷却ができ、操業率の向上お
よびロール費の低減ができる。[Effects of the Invention] According to the present invention, the top roll can be cooled without splashing cooling water onto the welded portion of the electric resistance welded pipe, and the operating rate can be improved and roll costs can be reduced.
第１図は本発明の１実施例の電縫管製造用ト・ツブロー
ルの冷却方法を示す説明図、第２図は電縫管の製造ライ
ンを示す平面図、第３図は溶接機ロールを示す斜視図で
ある。
１・・・電縫管、２・・・溶接部、３・・・トップロー
ル、４・・・吸水ロール、５・・・回転軸、６・・・ノ
ズル。Fig. 1 is an explanatory diagram showing a method of cooling a tube roll for manufacturing ERW pipes according to one embodiment of the present invention, Fig. 2 is a plan view showing a production line for ERW pipes, and Fig. 3 is a welding machine roll. FIG. DESCRIPTION OF SYMBOLS 1... ERW pipe, 2... Welding part, 3... Top roll, 4... Water absorption roll, 5... Rotating shaft, 6... Nozzle.
Claims (1)
ともに、冷却水がトップロールから流れ落ちる前に、冷
却水をトップロールに接触しトップロールと逆方向に回
転する吸水ロールにより吸水することを特徴とする電縫
管製造用トップロールの冷却方法。A cooling water nozzle injects cooling water onto the top roll, and before the cooling water flows down from the top roll, the cooling water is absorbed by a water absorption roll that contacts the top roll and rotates in the opposite direction to the top roll. A method for cooling top rolls for manufacturing ERW pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3570890A JPH03238179A (en) | 1990-02-16 | 1990-02-16 | Method for cooling top roll for producing electric resistance welded tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3570890A JPH03238179A (en) | 1990-02-16 | 1990-02-16 | Method for cooling top roll for producing electric resistance welded tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03238179A true JPH03238179A (en) | 1991-10-23 |
Family
ID=12449366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3570890A Pending JPH03238179A (en) | 1990-02-16 | 1990-02-16 | Method for cooling top roll for producing electric resistance welded tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03238179A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5883353A (en) * | 1996-02-08 | 1999-03-16 | Mitsubishi Denki Kabushiki Kaisha | Seam welding machine and method for protecting welding electrodes |
| JP2019188447A (en) * | 2018-04-26 | 2019-10-31 | 日本製鉄株式会社 | Electric resistance welding device |
-
1990
- 1990-02-16 JP JP3570890A patent/JPH03238179A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5883353A (en) * | 1996-02-08 | 1999-03-16 | Mitsubishi Denki Kabushiki Kaisha | Seam welding machine and method for protecting welding electrodes |
| JP2019188447A (en) * | 2018-04-26 | 2019-10-31 | 日本製鉄株式会社 | Electric resistance welding device |
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